claude login OAuth callback hangs when run inside the dev container (VS Code port forward)

[MyKEms]

Summary

When claude login (or the first ccd) is invoked inside the workspace container, the OAuth flow opens the host browser correctly, but the callback redirect to http://localhost:XXXX/callback never reaches
the CLI. The browser tab spins, the CLI sits waiting, and authentication never completes.

Steps to reproduce

1. Fresh dev container with no ~/.claude/.credentials.json on the host
2. Open project in VS Code → "Dev Containers: Reopen in Container"
3. Inside the container terminal: ccd or claude
4. Open/Copy the printed OAuth URL in the host browser, approve
5. Browser redirects to http://localhost:XXXX/callback?code=...
6. Tab hangs, CLI never receives the callback, eventually times out

Expected

Callback reaches the CLI's localhost listener inside the container, CLI prints "Login successful", credentials are written to /home/vscode/.claude/.credentials.json.

Actual

Callback never arrives at the in-container listener. CLI waits indefinitely (or until timeout).